Tool for removing hollow pintles, bushings, and the like



May 22, 1928. 1,670,574

1.]. w. HOWELL TOOL FOR REMOVING HOLLOW PINTLES, BUSHINGS, AND THE LIKE Filed April 20, 1927 Fig. I

Fig. 2

INVENTOR JAMES W. HOWELL O NEY Patented May 22, 1928.

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JAMES w. HOWELL, or CLEVELAND, onto, assrenoa TO THE WHITE Moroncoin PANY, OF CLEVELATt-l'f), OHIO, A CORPORATION OF OHIO.

TOOL FOR REMOVING HOLLGW PINTLES, BUSHINGS, AND THE LIKE.

Application filed April 20, 1927. Serial No. 185,251.

This invention relates to tools and more particularly to devices adapted to effect the removal ot a hollow pintle, tubular bushing or the like from a recess into which the bush: ing has been set by frictional contact.

One object of this invention is to provide a tool which facilitates the removal of a hollow pintle from a recess in which it is seated without marring, injuring or destroying the pintle or without enlarging or distorting the recess.

Another object of the invention is'to provide a tool which may be employed in separating a. hollow plug from a shaft having a perimeter equal to or coincident with the perimeter of the plug.

Another object of the invention resides in the production of an extracting tool which may be readily adjusted to the work and expeditiously operated by the workman.

Other objects more or less ancillary to the foregoing, and the manner in which the various objects are obtained, will be pointed out in the following description.

In the accompanying drawings, which show the preferred form of construction embodying the invention,

Figure 1 is an elevational view of the improved tool, showing the same applied to a hollow pintle associated with an engine crankshaft.

Figure 2 is a longitudinal section of the tool shown in Figure 1 with the hollow pintle partially removed from its shaft.

Figure 3 is a transverse section taken on a plane indicated by line 3-3 in Figure 2.

Figure 4 is a detail view in side elevation illustrating one of the elements of this device.

Figure 5 is an end elevational View of the element shown in Figure 4:.

Referring to the drawings in which like symbols designate 7 corresponding parts throughout each of the several views, a crankshaft 10, is illustrated generally in Figures 1 and 2, which is formed at its outer end with a recess 11, adapted to retain a hollow pintle or plug 12. The plug 12 which has been chosen as illustrative of one embodiment to which this invention may be applied is termed in the present case from a substantially cylindrical bar having a medial bore extending throughout its length, a shank 13, a flanged or shouldered portion 14;, intermediate its ends, and a spherical head 15, extending beyond the' end oi the shaft 1.0.

The tool embraced in this invention comprises a tubular body member 17, similar in construction to a lathe collet, a' ack screw 18, threaded into the inner end of the body 17, and a collar 19, loosely surrounding the body member and bored with a tapered The jack screw 18, is provided at its outer cndwith an enlarged head 22, which is crossbored at 23, to receive a handle 24.

The inner end of the screw 18, is axially bored at 25, to receive an extension rod 26, one end of which is journaled within the screw and retained therein by the engagement of a key 27 with an annular groove 28, formed in the rod 26, adjacent its end. The body member or collet 17, is constructed with a plurality of fingers 29, formed by longitudinal kerfs, 30, cut diametrically through the outer end of the collet and extending throughout the greater portion of its length. The free ends of the fingers, particularly the portions conterminous with the conical shoulder 21, of the collet are formed with an internal circumferential groove 31, complcmental in contour to the form of the work and so disposed with. relation to the ends of the fingers as to afford the intimate engagement of the lips 32, with the plug or pintle 12.

It is obvious that the configuration of this groove may be of any suitable. form, which is consonant with the contour of the work for which the tool is adapted to be used,

such as for instance, the toric recess illustrated in the present case.

When it is desired to. remove the hollow plug, the collar 19, is first retracted from the conical shoulder 21, and the collet manually forced over the element to be extracted. T he collar 19, is next adjusted into its en gaging position upon the shoulder 21, thus locking the fingers 29, of the collet from radial movement. The screw 18, may next be rotated so as to advance the extension rod 26, into engagement with the bottom of the recess 11. As the collet 17, is held in securement with the pintle 12, further movement of the screw will cause longitudinal posterior movement of the collet upon the screw, thus effectuating the retraction of the pintle. After the removal of the pintle 1.2, from the shaft, the collar 19, may be released and the pintle or plug ejected from the collet by advancing the jack screw 18, against the head 15, which will radially expand the engaging fingers of the collet and force the work from the tool.

Athough the foregoing description is necessarily of a detailed character, in order that the invention may be completely set forth, it is to be understood that the specific terminology is not intended to be restrictive or confining, and that Various rearrangements of parts and modifications of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

'Having described the invention, what is claimed and desired to be secured by Letters Patent is: i

l. A tool for extracting a tubular plug comprising a jack screw, a body member screw-threaded thereon, said body member having a plurality of fingers, the free ends of which are externally tapered, a collar coaxially disposed upon the body member and telescopically engageable with the tapered portion of the fingers, and an extension rod axially aligned and rotativeiy secured within the jack screw.

2. A tool for extracting a tubular plug comprising a jack screw, a resilient tubular body member, flexible fingers formed by longitudinal kcrfs extending through the greater length of the body member, there being a frustra-conical shoulder formed upon the outer periphery of the free ends of the fingers and a recess conterminously formed in the inner periphery of the body member, a collar surmounted upon the body member and adapted to co-operatively engage the frustra-conical portion of the fingers, and an extension rod rotativ-ely supported within the jack screw and separately secured thereto. 1

In testimony whereof I hereunto allix my signature April 18, 1927.

JAMES W. HOWVELL. 

